Tuple A tuple is a grouping of unnamed, ordered values. Each value in a tuple does not need to be the same type. Array An array is mutable collection. They are very efficient to create, but must always be a single type.
All of the following examples use Swift 4 Strings got a pretty big overhaul in Swift 4. When you get some substring from a String now, you get a Substring type back rather than a String. Why is this? Strings are value types in Swift. That means if you use one String to make a new one, then … Read more
This issue happens due to your view hierarchy. You need to find out what is your Current/Topmost view controller in view hierarchy and present your alert over it. To find out topmost view controller use following code: And present your alert over topmost view controller and use main thread to present an alert because closures may have … Read more
Swift has its own Date type. No need to use NSDate. Creating a Date and Time in Swift In Swift, dates and times are stored in a 64-bit floating point number measuring the number of seconds since the reference date of January 1, 2001 at 00:00:00 UTC. This is expressed in the Date structure. The following would give you the current … Read more
I faced the same error in a different context, in XCode 12.0.1 too. It might not be related, but I suspect its an issue with accessing the run loop of the main thread. I was just trying out some introductory code I found online, and faced the same issue, so this is a bug, rather than a … Read more
Go to Keychain Access -> Right-click on login -> Lock & unlock again Xcode -> Clean Xcode project ->Make build again
Background: What’s an Optional? In Swift, Optional<Wrapped> is an option type: it can contain any value from the original (“Wrapped”) type, or no value at all (the special value nil). An optional value must be unwrapped before it can be used. Optional is a generic type, which means that Optional<Int> and Optional<String> are distinct types — the type inside <> is called the Wrapped type. Under the hood, … Read more
I am getting a ‘Type of expression is ambiguous without more context ‘ on this part of code from a project I am trying to upgrade to latest Swift version. I can’t seem to figure it out. I tried different things but can’t get it to work. The problem is on the syntax of this line … Read more
CMYR – “his could also happen if you’ve wired up a button to an IBAction that doesn’t exist anymore (or has been renamed)” If you’re running into this problem make sure that you go to Main.storyboard, RIGHT click on the yellow box icon (view controller) at the top of the phone outline and DELETE the … Read more
CMYR – “his could also happen if you’ve wired up a button to an IBAction that doesn’t exist anymore (or has been renamed)” If you’re running into this problem make sure that you go to Main.storyboard, RIGHT click on the yellow box icon (view controller) at the top of the phone outline and DELETE the … Read more